| 摘要 |
PROBLEM TO BE SOLVED: To provide a power-supply control system for electrical equipment that allows the standby power to be zero by a more simple configuration and control.SOLUTION: A power-supply control system for electrical equipment includes: an AC power supply; a DC power-supply circuit that generates a DC power supply by rectifying the AC power supply by a rectifier circuit and smoothing the rectified power supply by a smoothing capacitor; an inverter circuit to which the DC power supply is applied; a relay that is disposed between the AC power supply and the DC power-supply circuit and turns on by being supplied with a driving current; a control circuit that controls the supply of the driving current and controls the inverter circuit; a control power-supply circuit that steps down the DC power supply and generates a control power supply supplied to the control circuit; a power-supply off switch for inputting a power-supply off signal to the control circuit to turn off an operating power supply of the electrical equipment; and discharge means for discharging residual charges in the smoothing capacitor. When the power-supply off signal is inputted, the control circuit turns off the relay and then discharges the residual charges in the smoothing capacitor via the discharge means. |
